The student of Wang Liang said he could go a thousand li a day with his horses pulling the chariot. But the student of Wang Liang questioned, "The two horses on the side are swift horses that can go a thousand li a day. And the two horses in the middle can also go a thousand li a day. How come I can not go a thousand li a day?" "It is because your rein1 of the horses are too long, so you can never go a thousand li a day."

　　王良的弟子說自己用這幾匹馬趕車可以日行千里。造父的弟子卻認(rèn)為他不可能做到這一點(diǎn)。王良的弟子質(zhì)問說：“我這兩邊的馬，是一天能跑一千里的馬，中間的兩匹役馬，也是一天能走一千里的好馬。怎么可能一天走不了一千里路呢？”造父的弟子說：“就因?yàn)槟惆疡R的韁繩系得太長(zhǎng)了，所以，你絕對(duì)走不了一千里路。”